Question

Pls give important formulas for waves chapter class 11​

Answer 1

Answer:

sorry don't have this subject

Answer 2

1. (α+в)²= α²+2αв+в²

2. (α+в)²= (α-в)²+4αв b

3. (α-в)²= α²-2αв+в²

4. (α-в)²= f(α+в)²-4αв

5. α² + в²= (α+в)² – 2αв.

6. α² + в²= (α-в)² + 2αв.

7. α²-в² =(α + в)(α – в)

8. 2(α² + в²) = (α+ в)² + (α – в)²

9. 4αв = (α + в)² -(α-в)²

10. αв ={(α+в)/2}²-{(α-в)/2}²

11. (α + в + ¢)² = α² + в² + ¢² + 2(αв + в¢ + ¢α)

12. (α + в)³ = α³ + 3α²в + 3αв² + в³

13. (α + в)³ = α³ + в³ + 3αв(α + в)

14. (α-в)³=α³-3α²в+3αв²-в³